Insulator.



R. T. LANGLAN.

INSULATOR.

APPLICATION FILED DBG. 10, 1907. l 901,627. Patented oct. 20, 1908. y?? Z l v Z5- i//ll/Arl I .A

ROYAL T. LANGLAN, OF BSTON, MASSACHUSETTS.

INSULATOR.'

Specication of Letters Patent.

Patented oct. 2o, 190e.

Application filed December 10, 1907. Serial No. 405,927.

To all whom fit may concern:

13e it known that I, ROYAL T. LANGLAN, of Boston, in the county of Suffolk and State of Massachusetts, have invented certain new and useful Improvements in Insulators, of which the following is a specification.

This invention; has relation to electrical railway cars and has primarily for its object to remedy the troubles which have been exa perienced in insulating the rheostat or resistance box from the frame-work or body of the car. Such rheostats or resistance boxes are usually located under the body of the car and are exposed to the water which is splashed or thrown upward by the wheels. The water drips or runs down from the car frame or leaks into the interstices between the box ,and its connecting bolt and forms a short circuit for the electrical current.

My invention consists of an insulator` which may be interposed between the frame of the box or rheostat and its supporting` beam, so constructed as to completely insulate the frame from the beam, and prevent the leakage of water from the frame to the supporting beam, or the formation of a film of water between them which would serve as a conductor for the electrical current.

Referring to the accompanying drawings,-Figure 1 represents an end elevation of a resistance box equipped with my invention. Fig. 2 represents an enlarged sect-ion on the line 22 of Fig. 1. Fig. 3 represents a side elevation of the rheostat or resistance box. Fig. 4 represents another embodiment of the invention.

Referring to the said drawings, it will be seen that the resistance box is provided with ends or end walls 10, which are connected by tie rods 11 11, 12 12 and 13. The grids or conductors 111, which constitute the resistance for the circuit, are supported by the rods 12, 12, 13, from which they are insulated in the usual manner. The end walls 10 are provided with outwardly projecting lugs or members 15, by which the box or rheostat may be hung from a support or beam which is indicated conventionally at 16. Bolts 17 are employed to connect the box with the beam. 4

I interpose between the beam and the box, and between the box and the bolt, an insulating device which may be described as follows: It consists of a body divided into two sections or members 18 and 23. The section 18 constitutes a spacer which is located between the under face of the beam and the lug 15. This section is provided with an annular boss 19 which projects down half-way into an aperture 2O formed in the lug 15. The top of the section is beveled, and said section is provided with a petticoat 21, separated from the body of the section by an annular V-shaped groove 22. The section 23 also has an upwardly-extending annular boss or flange 24, which projects upwardly into the aperture 2O in the lug so as to abut against the lower face of the liange 19. The upper face of the section 23 bears against the underface of the lug 1'5, said section being provided in its under face with a cavity 25. The bolt 17 is passed downward through the beam 16, the section 18, and the section 23; and its lower end projects into the cavit 1 or recess 25. The parts 18 and 23, as thus far described, are formed of any suitable insulating material, such as compressed liber or the like. The nut 26 is threaded on the end of the bolt and bears against a washer 27 interposed between it and the end wall of the cavity 25. I preferably inclose the nut or conceal it by a removable cover, and to this end, the section 23 is provided with an inclosing casing 28 which may be of metal. This casing is provided at its upper end with an inwardly-projecting iiange 29, which lies in a peripheral groove of the section 23. The casing projects beyond the lower end of the section and is internally threaded to receive a cover plate 291,said cover plate being provided with an angular boss 30 by which it may be rotated to screw it into place.

It is evident that, instead of passing the bolt downwardly through the insulator, its head may be embedded in the lower section and its shank passed upwardly through the upper section to receive the nut 26. In either case, the lower end of the bolt is inclosed.

From the foregoing description, it will be seen that the insulator forms an efficient means of insulating the bolt and the beam 16 from the lug 15 of the box. The petticoat serves to conduct the water, which drips from the beam, away from the bolt, so that there is no danger of the water leaking between the sections of the insulator,so as to form a path of electrical communication between the bolt and the box. As a matter of construction, it may be stated that the insulating portion of the' section 23 may be compressed in or forined in the :asing 28 in the process of its manufacture.

Having thus explained the nature of iny said invention, and described a way of constructing and using the saine, although without attempting to set forth all of the forms in which it may be inade or all of the modes of its use, whatl claim is:

l. An insulator comprising two separable sections having bosses with abutting faces, one of said sections constituting a spacer' and the other being formed to inclose the lower end of a bolt, substantially as described.

2. The combination with a support, a bolt, a nut, and a ineniber to be supported thereby and insulated therefrom, of an insulator comprising two sections, one section interposed as a spacer between said ineinber and said support, said sections having annular' ianges meeting in an aperture formed in said ineinber and having alined apertures to receive said bolt.

An insulator' comprising two separable sections having aliiutting faces, one of said sections constitutingl a spacer and the other being formed with a cavity, and having a cover to close said cavity.

4L. An insulator comprising a body formed of insulating material having an aperture to e receive a bolt, said body having a cavity to receive a nut for Vthe bolt, an inclosing casing, and a cover for said cavity attached to said casing.

5. An insulator of the character described, comprising a body divided transversely in two abutting sections, the upper section constituting a spacer and having a pctticoat, the said sections having alined apertures to re ceive a bolt, the lower section being formed to inclose the lower end of a bolt, substantially as described.

In testimony whereof l have allixed niy signature, in presence of two witnesses.

Vitnesses z A. L. FoLson, lin'rnn lV, Pmzzn'r'ri. 

